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NEET Sample Paper NEET Sample Test Paper-85

  • question_answer
    A parallel monochromatic beam of light is incident normally on a narrow slit. A dim-action pattern is formed on a screen placed perpendicular to the direction of the incident beam. At the first minimum of the diffraction pattern, the phase difference between the rays coming from the two edges of the slit is

    A) \[0\]     

    B)                    \[\pi /2\]

    C) \[\pi \]               

    D)        \[2\pi \]

    Correct Answer: D

    Solution :

    [d] For first minima the path difference between the rays coming from the two edges should be\[\lambda \] which corresponds to a phase difference of \[2\pi \]


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